between president obama and now the re-elected president vladimir putin. four years after pledging a reset to relations with the russian president at the time, medvedev, obama's instead dealing with a newly reelected putin, who's shown no inclination to cooperate with the united states agenda. in fact, russia dpgone out of i way to block renewed trade negotiations with north korea. after the last meeting between the two men, president obama tried to focus on the few areas of agreement, like arms control. >> we agreed that we need to build on these successes. even as we recognize that there are going to be areas of disagreement and that we can find constructive ways to manage through any bilateral tensions. >> i want to focus on this, because i think this foreign policy challenge is the biggest one nobody talks about when it comes to the united states. it's russia. the president's ability to manage these tensions and president putin's willingness to meet him even a quarter of the way, let alone halfway, could end up defining president obama's foreign policy